Ƙirar Riser wani muhimmin al'amari ne na aikin simintin gyare-gyare, yana tabbatar da cewa simintin gyare-gyare ba su da lahani kamar ramukan raguwa da porosity. Risers, wanda kuma aka sani da feeders, suna aiki azaman tafki na narkakkar ƙarfe waɗanda ke ciyar da simintin gyare-gyare kamar yadda yake ƙarfafawa da kwangila.
Zane Riser don Simintin Karfe
In Karfe zuba jari simintin gyaran kafa, Babban makasudin ƙirar riser shine don tabbatar da isasshen abinci na narkakkar karfe don ramawa ga raguwar volumetric yayin ƙarfafawa. Karfe yana son samun babban raguwar rates, yana yin ingantaccen ƙira mai mahimmanci.
Don simintin ƙarfe, ana amfani da manyan nau'ikan risers guda biyu:bude masu tashi kumamakafi tashi. Bude masu tashi suna fallasa zuwa yanayi, yayin da makafi masu tashi suna kewaye a cikin gyaggyarawa. Masu hawan makafi sun fi dacewa wajen rage asarar zafi.
Ya kamata masu tashi su kasance a wurare mafi nauyi na simintin gyare-gyare inda aka fi samun raguwa. Ya kamata a tsara girman da siffar mai hawan don tabbatar da isasshen ƙarar narkakken ƙarfe. Ana amfani da hawan cylindrical don sauƙin cirewa da tasiri wajen ciyarwa. Sau da yawa ana amfani da hannaye masu rufewa da kayan exothermic don kula da yanayin zafin mai tashi, tabbatar da cewa ya wanzu narkakkarsa fiye da simintin gyare-gyare.
Zane Riser don Ƙarfe na Ƙarfe
Dominbaƙin ƙarfe zuba jari simintin gyaran kafa, musamman launin toka da baƙin ƙarfe ductile, makasudin shine don sarrafa halayen haɓaka yayin ƙarfafawa. Ba kamar karfe ba, wasu nau'ikan ƙarfe suna faɗaɗa a lokacin matakan ƙarshe na ƙarfafawa, rage buƙatar manyan masu tashi.
Makafi masu tashi an fi son yin simintin ƙarfe saboda ingancinsu. Don ductile baƙin ƙarfe, ƙarami risers iya sau da yawa isa saboda graphite fadada a lokacin solidification.
Ana iya amfani da ƙarami, ƙarami mai ɗaci don yin simintin ƙarfe. Siffar na iya bambanta amma ya kamata a rage girman filin da aka fallasa ga asarar zafi yayin da ake haɓaka ingancin ciyarwa. Chills (kayan da ke ɗaukar zafi) wani lokaci ana amfani da su tare da masu tashi don sarrafa ƙimar sanyaya da haɓaka haɓakar jagora zuwa ga mai tashi.
Zane na Riser don Non-ferrousAlloy Castings
Alloys ɗin da ba na ƙarfe ba, irin su aluminum da na jan ƙarfe, suna da ɗabi'un ƙarfafawa daban-daban idan aka kwatanta da ƙarfe na ƙarfe. Manufar farko ita ce don hana lahani kamar raguwar porosity da kuma tabbatar da cikar gyambon.
Don simintin gyare-gyaren da ba na ƙarfe ba, ana amfani da buɗaɗɗen buɗaɗɗiya da makafi, dangane da ƙirar gami da ƙirar simintin. Buɗaɗɗen tashi sun fi zama ruwan dare don ƙananan simintin gyare-gyare, yayin da ake amfani da masu tashi makafi don manyan simintin gyare-gyare.
Alamomin da ba na ƙarfe ba yawanci suna buƙatar sanya masu tashi a mafi girman wuraren yin simintin don amfani da nauyi.
Girman mai hawan yana buƙatar yin lissafin ƙananan yawa da mafi girman raguwar adadin gami da ba na ƙarfe ba. Masu tashi masu ƙwanƙwasa ko wuya na iya taimakawa wajen rage asarar zafi da inganta ingantaccen ciyarwa. Insulation yana da mahimmanci ga abubuwan da ba na ƙarfe ba, saboda gabaɗaya suna ƙarfafa a ƙananan yanayin zafi. Exothermic kayan aiki da insulating hannayen riga na iya taimakawa wajen kula da narkakkar yanayin tashin na dogon lokaci.
Lokacin aikawa: Dec-20-2024